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p0302 #2 misfire code

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Old Nov 14, 2009
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p0302 #2 misfire code

hi every one im new to the site what i have is a 2001 honda civic lx with misfire #2 this is what iv done so far new rings, head gasket, swaped coils plugs and injectors around still same #2 misfire compression on #2 was 80psi thats why i honed and installed new rings from honda please help
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Old Nov 14, 2009
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Re: p0302 #2 misfire code

whats the compression like after all the repairs?
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Old Nov 14, 2009
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Re: p0302 #2 misfire code

just checked it about 30mins ago and its the same on cylinder #2
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Old Nov 14, 2009
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Re: p0302 #2 misfire code

well then i think the headgasket wasnt done properly or the head wasnt milled flat so it just blew again. was the head checked for compression before putting it back on? may be a problem with the head itself if it cracked. head should always be resurfaced and tested for compression, cracking, etc and cleaned up.
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Old Nov 14, 2009
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Re: p0302 #2 misfire code

the plugs look good dont seem to be loosing any atifreeze could it be the valves?
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Old Nov 14, 2009
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Re: p0302 #2 misfire code

its possible the valve seal is messed up. it may be fixable without removing the head.
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Old Nov 16, 2009
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Re: p0302 #2 misfire code

When you do a compression test and find a problem it is usually a good idea to do both 'wet' and 'dry'. Do the dry test first which is the standard compression test. Then for the wet test squirt about a tablespoon of engine oil in each cylinder before testing compression again. If the rings are good, you will see a small increase in the reading because the oil seals better than the rings alone but not a large amount. If you have a cylinder with a low dry reading and the oil causes it to be about the same as the others, you have bad rings in that cylinder. If the oil causes little change in the reading for the bad cylinder it is either the valves or the head gasket as mentioned.
It really doesn't matter if it's gasket or valves, the head will probably have to come off. It is possible to replace the valve stem seals without removing the head but this usually shows up more as burning oil and blue smoke rather than loss of compression.
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